chicago, where they had to create this amazing they, this white city from plaster and whatever in no time. they bear learned how to almost triage in terms of creating the some -- these remarkable combinations of architecture, painting, and sculpture. and the building was finally opened to the public in early 1897. in the end, and consisted of 400,000 cubic feet of granite, 3,000 tons of iron and steel, and 70,000 barrels of cement. >> one of the things that appealed to congress was that in the building, general casey out- europed your . >> a lot people think of the library of congress as our paris opera, built by napoleon third, as one of the key emblems of his reign.